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Magnetic Field

A bar magnet ...

Question

A bar magnet of magnetic moment $M$ is cut into two equal parts along its axis. The magnetic moment of each part is

A

M

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B

M / 2

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C

2 M

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D

M / 3

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Solution

The correct option is C $M / 2$
Pole strength is halved
$∴$ Magnetic moment is also halved. (Magnetic length remains the same)

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